1 doctor weighed in:
How long should an allergic reaction symptom to an antibiotic last for?
1 doctor weighed in

Dr. Barbara Stark Baxter
Internal Medicine - Allergy & Immunology
In brief: Antibiotic allergy
Antibiotic allergies can clear up in a day or last up to six months.
Fortunately, most resolve relatively quickly, over a few days. We do not yet know why some persist for a long time and require strong medications like oral steroids (e.g. Prednisone) in order to settle down.

In brief: Antibiotic allergy
Antibiotic allergies can clear up in a day or last up to six months.
Fortunately, most resolve relatively quickly, over a few days. We do not yet know why some persist for a long time and require strong medications like oral steroids (e.g. Prednisone) in order to settle down.
Dr. Barbara Stark Baxter
Dr. Barbara Stark Baxter
Thank
Get help from a real doctor now
Dr. Christopher Crosby
Board Certified, Dermatology
12 years in practice
93K people helped
Continue
108,000 doctors available
Read more answers from doctors